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Call options are Mute or Unmute, Contacts, Menu, Auto volume on or Auto volume
off, Record, Lock keypad, Audio enhancing, Loudspeaker, or Handset.
Network services options are Answer and Reject, Hold or Unhold, New call, Add to
conference, End call, End all calls, and the following:
Send DTMF — to send tone strings
Swap — to switch between the active call and the call on hold
Transfer — to connect a call on hold to an active call and disconnect yourself
Conference — to make a conference call that allows up to five persons to take part
in a conference call
Private call — to discuss privately in a conference call